| 摘要 |
PROBLEM TO BE SOLVED: To provide an erection method by which overhanging erection is performed from both sides (left and right) without generating displacement at an intermediate closure portion due to construction error in the SPC bridge erection method.SOLUTION: In a cantilever overhang erection method in which a bridge is constructed by one block of an overhang bridge body 1 at a time from a bridge support base by using a mobile work vehicle 6: an encapsulation steel material 10 arranged in the bridge support base is made to overhang by a required length toward a next overhang bridge body 1 block side; the protrusion end of the encapsulation steel material 10 is connected to one end side of the encapsulation steel material 10 of a next overhang bridge body 1 block, while a tip of the other end side is made to protrude from the overhang bridge body by a required length; an adjustment hanging material 17 from the mobile work vehicle 6 is attached to the protruding tip to adjust a tip level for construction; and a free end of the connected encapsulation steel material 10 is adjusted in accordance with a design (planned value) level for each block. Thus, construction errors in the blocks can be prevented from being accumulated so that a smooth closure of left and right blocks can be performed at a final intermediate closure portion without large construction error therebetween. |
